Machine for molding.



E. G. COVERT. MACHINE TOR MOLDING.

APPLICATION rnnn BEPT.11,1911.

,O27,595. v I Patented May 28, 1912.

2 SHEETS-SHEET 1.

E. G. COVERT.

MACHINE FOR MOLDING. urmouzon FILED 8EPT.11,1911.

1,027,595. Patented May 28, 1912.

' 2 SHEETS-SHEET. 2.

mason-1c. covEIw, or CHICAGO, ILLINOIS, AssIGNon. 'ro AMERICAN-STEEL roummms,

UNITED STATES PATENT OFFICE.

, OFNEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

, MACHINE r03 IIQLDING.

' Specification of Letters Patent.

,. Patented May 28,1912.

Application filed September 11,191 Serial No. 648,790.

. To all whomit may concern:

Be it known that I, EDSON C. Covnnr, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Machines for Molding,

of which the following is a specification.

-My invention relates to the art of mold- -'ing and has particular reference to semiautomatic means for handling flasks and pattern plates, supplying sand to the flasks,

- jolting the sand and finally reversing the flask .and-drawingthe' pattern.

In the manufacture of castings, the development during recent years has been along and lessen eliminated and by the arrangement of ap- In the machine of the present invention it is believed that hand labor is. largely eliminated; that skilled labor is practically unnecessary and that the arrangement 1s aL-gcylinder 12,

the plunger 10.

such that the operations are continuous to the end that no time is wasted.

.Themachine hereillustrated is intended particularly for use with flasks of medium size although by modifications it'may be adapted for heavy flasks if desired.

M invention will be'more readily understood by reference to the accompanying drawings, wherein- I Figure 1 is a-side elevation of a molding machine constructed in accordance with my invention, and Fig. 2 is an end elevation of the same construction.

Referring more particularly suitable base preferably hollow to lessen weight and provided with a conduit 11, by means of which fluid such as oil or water may be directed to the upper nd thereof. Upon this plunger is mounted suitable packing or packing rings" being rovided in order to make. a fluid-tight joint between the cylinder and Preferably integral with lines tending toincrease production the cost thereof. This is accomplished by the use of automatic machinery whereby hand work is to a certain extent to the drawlower measure is then the cylinder 12 are two pairs of oppositely disposed radial arms 13, 14. Each pair of arms is provided with registering recesses 15, 16, within which the trunnions 17, 18, of metallic pattern plates 19, 20, are seated. Projecting through openings in one. of the arms of each pair are pins-21, 22, these pins acting as stops to hold the pattern plate in horizontal'position. The pins may be so arrangedas to seat within one of the openings 23, 24, formed in the pattern plate,-in which case when it is desired to turn over the pattern and superposed flask, the pin is removed, the flask and plate allowed to turn, then the pin is inserted to hold the plate in reversed position. It'will be seen that the cylinder 12, together with its integral arms and the flasks carried by the arms may all be rotated on the plunger 10, the, weight being supported by'the fluid confined in the cylinder and that such rotation may be easily performed by hand.

In order to supply sand to the flasks I i prefer to employ the novel means shown, such means including two bins 25, -26. Mounted below the bins are two measuring devices 27, 28, each measuring device bein adapted to containthe requisite amount 0 backing and facing sand. to fill a flask.

These sand supplying'devices are provided with wheels 29, 30,'which cooperate with tracks 31, 32,-provided on the lower edges of the bins. On the lower edge oft-he measur-- ing device 28 is a further track 33. To fill the measuring devices they are placed in position of grating underneath the bins shifted to fill the measures. The measure 27 is then shifted by means of the wheels 29 onto the track 33, then both measures 27, 28, are

shifted to a point over a flask carried by one of the wheels 13, 14 the sand in the sand in theupper measure is dumped and allowed to pass through the lower measure.

- I will not here describe the sand measuring the full'lines of Fig. 21-and the dumped, then the which is carried a fluid pressure cylinder -Within this cylinder is mounted a piston, to

This packing is more satisfactorily accomplished by the use of a structure of the form of a grid such as is shown. Directly underneath the 'gridis positioned a mechanical jolter 39, as shown in Fig. 1. A car 40, mounted on a track 41, is positioned on the side of the machine opposite to the jolter.

It will be seen that the cylinder and its connected parts are adapted to be raised and lowered 011 the plunger 10. In order that the jolter 39 may be automatically started and stopped, I rovide a lever 43, attached at 44 to a portion of the frame work. To this lever 43, is connected a rod 45, which operates the valve controlling the action of the jolter. It will be seen that the rod 43 has an inclined surface 46, which is adapted to contact the flange 12 of the cylinder 12.

The operation of my molding machine is as follows: Assuming the arms 13, 14, to be in the position shown in Fig. 1, a pattern plate is supplied to the arms,13 and held in upright position by means of the pin 21. A

flask 47 1s supplied to the top of the pattern plate and the parts rotated until the flask is underneath the sand supplying means, as shown in dotted lines in Fig. 2. Sand is supplied and the machine rotated further until the flask is located over the jarring machine 39. The fluid in the cylinder is then allowed to escape through the duct 11, and the flask deposited upon the j arrin machine. As the cylinder descends the ange 12 will contact the inclined surface 46 of y the lever 43 and start the jarring machine into action. The grid is then lowered for the requisite time. Wfhenthe sand has been sufliciently jolted, the cylinder is raised and the flask picked up. Meanwhile another flask andpattern plate has been supplied to the then empty pair of arms 14. The machine is then rotated a quarter turn, sand is sup lied to the empty flask, and while the san is being supplied, the pin 21 is removed and the flask and pattern plate allowed'to turn bottom up. Rotation is then continued until the recently filled flask is over the jolter when the cylinder is allowed to descend. As the flask is deposited upon the jolter, the previously filled and jolted flask is lowered onto the car 40, as shown in dotted lines in Fig. 1, and while the ,jolting action is taking place on the other flask, the

completed flask is disconnected from the pattern plate and removed by the car.

It will be seen that the operations described may be continued indefinitely and that there is no waste of time while the operations are being performed. It will be seen also that although I have shown but two radially projecting arms, that four or any other desired number might be employed. Furthermore, that different sand supplying devices might be used and that various other modifications might be made, all without departing from the spirit of my invention.

I claim:

1. A device of the class described, comprising, in combination, a rotatable and vertically movable carrier adapted for bodily vertical movement and rotation about a fixed axis, a plurality of pattern plates and flasks, each rotatably mounted on said car- 7 rier, means for sup lying sand to said flasks, means for jo ting said sand and means cooperating with said carrier for drawing the pattern, substantially as described.

2. A device of the class described comprising, in combination, a plunger, a carrier mounted on said plunger and adapted for vertical movement and rotation relative to said plunger, pattern plates and flasks mounted on said carrier, means for holding said pattern plates and flasks in horizontal position, means for supplying sand to said flasks, means for jolting the sand in said flasks and means for drawing the pattern, substantially as described.

3. A molding machine comprising, in combination, a stationary plunger, a cylinder cooperating with said plunger,'a plurality of carrier arms connected to said cylinder, pattern plates and flasks mounted on said carriers, means for holding said pattern plates and flasks in horizontal position,

means for supplying sand to said flasks, means for jolting the sand and means for tially as described.

5. A molding machine comprising, in combination, a plunger, a cylinder mounted on said plunger and adapted for rotation and vertical movement with relation thereto, a plurality of pairs of carriers projecting matic means for starting and stopping said" radially from said cylinder, means on said carrieradapted to receive the trunnions of pattern plates, flasks carried by said pattern lates, means for s asks, means for jo ing said sand, autojelter and means for drawing said pattern plying sand to said and removing said flask, substantially as dey scribed.

' EDSO N o. COVERT,"

, Witnesses: i

' STANLEY H. KE sHAw,

HARRY A. MOUL. 

